My late 2011 13" macbook pro ran out of battery today, and when I reconnected the charger, it would not start. Here's what happens: The charging indicator light turns on, and stays green When I press the power button, nothing happens. When I press the battery status button, one led flashes for a few seconds. If the charger is not plugged in, nothing happens when I press the battery status button I tried the following: I tried to reset the SMC by opening up the macbook, unplugging the battery, holding the power button for a long time (about a minute), reconnecting the battery cable, closing the macbook, connecting the charger. The sleep light flashed a few times (3 times), about one flash/sec, which made me suspect a memory error. I opened up the macbook, took out both memory blocks and put them back in. Nothing I tried turning it on with only one of the two memory blocks. Neither worked. I tried turning it one with the battery disconnected. Nothing. The sleep light sometimes flashes a few times when I connect the charger. One, two, three or four times; the number varies, but it is usually around one flash per second. I think the issue is probably battery related - the battery life has been diminished over the last week. However, It worries me that it does not work when plugged in to a power source, after resetting the SMC. I am planning: To try with someone else's charger when I get the chance To try with a different battery if I can convince one of my friends to let me take the battery out of his macbook. Any other suggestions or experiences?